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Research

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research Hydrogen peroxide and monoethanolamine are the key causative ingredients for hair dye-induced dermatitis and hair loss

34 citations , January 2012 in “Journal of Dermatological Science”

In this mouse study, researchers found that hydrogen peroxide and monoethanolamine in hair dyes may be key contributors to dermatitis and hair loss due to oxidative stress.

research Alopecia areata after severe allergic contact dermatitis to a permanent hair dye

August 2022 in “Contact dermatitis”

This case report describes a 24-year-old male who developed alopecia areata following an allergic reaction to a permanent hair dye, possibly linked to previous sensitization from a henna tattoo.

A Survey of Awareness, Knowledge, and Behavior of Hair Dye Use in a Korean Population with Gray Hair

research A Survey of the Awareness, Knowledge and Behavior of Hair Dye Use in a Korean Population with Gray Hair

19 citations , January 2012 in “Annals of Dermatology”

This article recommends creating a system to educate users about the ingredients and side effects of hair coloring products and does not report new research findings.

research Formulation And Evaluation of Herbal Hair Dye

June 2026 in “Zenodo (CERN European Organization for Nuclear Research)”

This study formulated an herbal hair dye using the medicinal herb Eclipta alba and other natural ingredients, finding it provided satisfactory coloring effects, conditioning benefits, stability, and safety, which supports its potential as a natural alternative to synthetic hair dyes.

research Formulation And Evaluation of Herbal Hair Dye

June 2026 in “Zenodo (CERN European Organization for Nuclear Research)”

In this study, researchers formulated a herbal hair dye using Eclipta alba and evaluated it for various parameters, finding it provided satisfactory coloring, conditioning, and stability without irritation, supporting its potential as a safer alternative to synthetic dyes.

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Community Join

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community 5 month progress on Locklabs oral tablet

23 upvotes 8 months ago

The user experienced significant hair regrowth over five months using Locklabs oral tablets, with no side effects and only a minor shed. They dye their hair black to cover natural blonde, which may affect perceived hair density.

community Exploring Bryan Johnson's Hair Routine In Detail

64 upvotes 2 years ago

Bryan Johnson uses a custom hair loss treatment that includes topical finasteride, minoxidil, azelaic acid, diclofenac, tea tree oil, rosemary oil, ginkgo biloba, biotin, and melatonin, which have shown varying degrees of effectiveness with minimal side effects. He also undergoes PRP and laser therapy, and has tried dutasteride mesotherapy.

community 2 months 8 days on fin+minoxdil( hair wet in both pictures)

456 upvotes 1 year ago

A user reported positive hair regrowth using finasteride and minoxidil for 2 months, noting thicker roots and improved appearance. The post led to skepticism and discussions on treatment methods and side effects.

community Peptides that Stop Hair Loss? | In-depth Literature Review Video

76 upvotes 2 years ago

Peptides like TB500, KPV, GHK-CU, and BPC-157 are overhyped for hair growth with limited proven effectiveness in humans. Combining peptides with delivery methods like iontophoresis and sonophoresis shows promise, but many claims remain unproven.

community Ketoconazole shampoo, which one to choose??

in Ketoconazole 6 upvotes 9 months ago

Ketoconazole shampoo is recommended at a 2% concentration for hair loss, with advice to leave it in the hair for 2-5 minutes. Users discuss different brands, noting that Nizoral contains artificial dyes, and suggest alternatives without dyes.

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Learn

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learn Hair Transplant

Can I dye my hair after a hair transplant? Wait 4-6 weeks before dyeing your hair after a hair transplant.
Can I style or care for my transplanted beard after the hair transplant? You can style and care for your transplanted beard like natural hair after it heals.
When can I cut or style my hair after a hair transplant? You can cut or style your hair about 1 month after a hair transplant.
All 4 questions on Hair Transplant →

learn Scalp Micropigmentation

Can I still color or style my hair after scalp micropigmentation? You can color and style your hair after scalp micropigmentation once fully healed.

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Clinics

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All 13 clinic results →

Experts

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Unscored
SMP Specialist
Hairo Fallas
Newark, NJ, United States

Hairo Fallas